This would be incredibly beneficial - for those who find bright screens/ looking at bright screens difficult for longer periods of time.

The option to choose a colour would be appreciated.

This would be great news if this was approved.

Taking this a step further - allowing users to pick a theme color would be optimal and serve more clients. If you confer with eye therapists, you'll learn that people tolerate certain colors and see with less strain via a different color base. For printed paper, there are overlays available in an array of colors for that very reason. Speaking from personal experience as a parent of a kid who needs a lavender overlay to reduce eye strain, providing flexibility for the users would be a more inclusive option. Also, I have tested forcing the dark mode on Ali and it adversely affects the toolbar.

This would also benefit users who suffer migraine headaches and are sensitive to bright light.